Rasagiline, a monoamine oxidase-B inhibitor, protects NGF-differentiated PC12 cells against oxygen-glucose deprivation

✍ Scribed by Saleh Abu-Raya; Eran Blaugrund; Victoria Trembovler; Eugenia Shilderman-Bloch; Esther Shohami; Philip Lazarovici

• Book ID: 101244939
• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 240 KB
• Volume: 58
• Category: Article
• ISSN: 0360-4012
• DOI: 10.1002/(sici)1097-4547(19991101)58:3<456::aid-jnr12>3.0.co;2-s

✦ Synopsis

In our in vitro model, rasagiline a selective irreversible monoamine oxidase-B (MAO-B) inhibitor, protected nerve growth factor (NGF)-differentiated PC12 cells from cell death under oxygen and glucose deprivation (OGD). The severity of the OGD insult, as expressed by cell death, was time-dependent. Exposure of the cells to OGD for 3 hr followed by 18 hr of reoxygenation caused about 30-40% cell death. Under these conditions, the neuroprotective effect of rasagiline was dose-dependent: rasagiline reducing OGDinduced cell death by 68% and 80% at 100 nM and 1 µM, respectively. The neuroprotective effect of rasagiline was also observed when added after the OGD insult (55% reduction in cell death). Under rasagiline treatment, there was a lesser decrease in ATP content in cultures exposed to OGD compared with that in untreated cultures. OGD followed by reoxygenation resulted in a several fold increase in PGE 2 release into the extracellular medium. Rasagiline (100 nM-1 µM) markedly inhibited OGD-induced PGE 2 release. Clorgyline, a monoamine oxidase-A (MAO-A) inhibitor, did not protect NGF-differentiated PC12 cells against OGD-induced cell death. As NGF-differentiated PC12 cells contain exclusively MAO type A, these data suggest that the neuroprotective effect of rasagiline under OGD conditions is independent of MAO inhibition.